Patents by Inventor Tatsuomi Nakayama
Tatsuomi Nakayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11732862Abstract: An indicator lamp of the present invention includes a lamp body, a light source unit disposed inside the lamp body, and a light transmissive resin member disposed at a position for transmitting light that is emitted from the light source unit and for outputting the light from the lamp body. The light source unit emits red light having a maximum value of light intensity at a wavelength of 600 nm or longer and 700 nm or shorter. The light transmissive resin member has an L* value of 35 or less, a transmittance of light having a wavelength of 675 nm of 90% or greater and a total light transmittance of 5% or greater in the state in which an optical path length of transmitting light is 2 mm. This configuration provides an indicator lamp with excellent design that shows its presence by showing a red chromatic tone when a light source is turned on and that shows a black color tone when the light source is turned off.Type: GrantFiled: July 30, 2020Date of Patent: August 22, 2023Assignees: NISSAN MOTOR CO., LTD., MITSUBISHI CHEMICAL CORPORATIONInventors: Yu Sasaki, Tatsuomi Nakayama, Yusuke Hirata, Takao Marutani, Tadayoshi Sawada
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Publication number: 20220364704Abstract: An indicator lamp of the present invention includes a lamp body, a light source unit disposed inside the lamp body, and a light transmissive resin member disposed at a position for transmitting light that is emitted from the light source unit and for outputting the light from the lamp body. The light source unit emits red light having a maximum value of light intensity at a wavelength of 600 nm or longer and 700 nm or shorter. The light transmissive resin member has an L* value of 35 or less, a transmittance of light having a wavelength of 675 nm of 90% or greater and a total light transmittance of 5% or greater in the state in which an optical path length of transmitting light is 2 mm. This configuration provides an indicator lamp with excellent design that shows its presence by showing a red chromatic tone when a light source is turned on and that shows a black color tone when the light source is turned off.Type: ApplicationFiled: July 30, 2020Publication date: November 17, 2022Applicants: NISSAN MOTOR CO., LTD., MITSUBISHI CHEMICAL CORPORATIONInventors: Yu SASAKI, Tatsuomi NAKAYAMA, Yusuke HIRATA, Takao MARUTANI, Tadayoshi SAWADA
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Patent number: 9964366Abstract: The heat-radiating system which radiates heat by heat exchange between a substrate 22 and cooling fluid. The heat-radiating system has a cooling structure that includes a vortex flow generating portion C1 on the surface of the substrate 22 in contact with the cooling fluid. The vortex flow generating portion C1 is composed of a plurality of recesses 22b that extend in the direction ? intersecting the flow direction of the cooling fluid and causes a vortex flow depending on the flow condition of the cooling fluid. The recess depth H of the vortex flow generating portion and the laminar sub-layer thickness ?b near the wall surface satisfy the relation of H>?b=63.Type: GrantFiled: October 2, 2013Date of Patent: May 8, 2018Assignee: NISSAN MOTOR CO., LTD.Inventors: Yousuke Koizuka, Tatsuomi Nakayama
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Publication number: 20160231069Abstract: The heat-radiating system which radiates heat by heat exchange between a substrate 22 and cooling fluid. The heat-radiating system has a cooling structure that includes a vortex flow generating portion C1 on the surface of the substrate 22 in contact with the cooling fluid. The vortex flow generating portion C1 is composed of a plurality of recesses 22b that extend in the direction ? intersecting the flow direction of the cooling fluid and causes a vortex flow depending on the flow condition of the cooling fluid. The recess depth H of the vortex flow generating portion and the laminar sub-layer thickness ?b near the wall surface satisfy the relation of H>?b=63.Type: ApplicationFiled: October 2, 2013Publication date: August 11, 2016Applicant: NISSAN MOTOR CO., LTD.Inventors: Yousuke KOIZUKA, Tatsuomi NAKAYAMA
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Patent number: 9243855Abstract: A cooling structure for cooling a heat generating element allows cooling fluid to circulate around the heat generating element or a base material with the heat generating element disposed thereon. The cooling structure is provided with a vortex-flow generating portion which extends in a direction intersecting a circulation direction of the cooling fluid, and which generates a vortex flow depending on the flow rate of cooling fluid.Type: GrantFiled: March 15, 2013Date of Patent: January 26, 2016Assignee: NISSAN MOTOR CO., LTD.Inventors: Yousuke Koizuka, Tatsuomi Nakayama, Ichiro Ishikawa
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Publication number: 20150168084Abstract: A cooling structure for cooling a heat generating element allows cooling fluid to circulate around the heat generating element or a base material with the heat generating element disposed thereon. The cooling structure is provided with a vortex-flow generating portion which extends in a direction intersecting a circulation direction of the cooling fluid, and which generates a vortex flow depending on the flow rate of cooling fluid. A cooling structure for cooling a heat generating element allows cooling fluid to circulate around the heat generating element or a base material with the heat generating element disposed thereon. The cooling structure is provided with a vortex-flow generating portion, which extends in a direction intersecting a circulation direction of the cooling fluid, and which generates a vortex flow depending on the flow rate of cooling fluid.Type: ApplicationFiled: March 15, 2013Publication date: June 18, 2015Inventors: Yousuke Koizuka, Tatsuomi Nakayama, Ichiro Ishikawa
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Patent number: 7328637Abstract: An apparatus for machining a circumferential surface defining a cylindrical bore of a workpiece, the apparatus including a tool holder rotatable about a first rotation axis, and a form roller supported on the tool holder so as to be rotatable about a second rotation axis parallel to a central axis of the cylindrical bore of the workpiece. The form roller has a diameter smaller than a diameter of the cylindrical bore of the workpiece and is adapted for forming a plurality of microscopic recesses on the circumferential surface defining the cylindrical bore of the workpiece.Type: GrantFiled: April 28, 2005Date of Patent: February 12, 2008Assignee: Nissan Motor Co., Ltd.Inventors: Kazuhiko Takashima, Tatsuomi Nakayama, Minoru Ota, Manabu Wakuda
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Patent number: 7134304Abstract: A micro-roll forming device for providing a cylindrical blank metal article with a minute convexoconcave bearing surface, comprises a powered article holding structure that, when energized, rotates the cylindrical blank metal article about its axis; a forming tool that includes a form roller with a corrugated circular ridge; a tool holding structure that holds the forming tool in such a manner that the corrugated circular ridge of the form roller is directed toward and in contact with an outer surface of the cylindrical blank metal article rotatably held by the article holding structure; a biasing member that is incorporated with the tool holding structure to press the form roller against the outer surface of the cylindrical blank metal article with a given pressing force; and a powered moving structure that, when energized, moves at least one of the article holding structure and the tool holding structure in such a manner that the selected one moves in both a first direction perpendicular to an axis of the uType: GrantFiled: November 8, 2004Date of Patent: November 14, 2006Assignee: Nissan Motor Co., Ltd.Inventors: Tatsuomi Nakayama, Minoru Ota, Manabu Wakuda, Kazuhiko Takashima
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Patent number: 7121928Abstract: A high smoothness grinding process for obtaining a highly smooth surface of a metal material member. The process includes grinding an outer peripheral surface of a cylindrical or generally cylindrical metal material member by using a super abrasive grain grinding wheel in a condition in which a value [a peripheral speed of the grinding wheel/a peripheral speed of the metal material member] is not larger than 100, the grinding serving as a main grinding step.Type: GrantFiled: March 1, 2005Date of Patent: October 17, 2006Assignee: Nissan Motor Co., Ltd.Inventors: Kazuhiko Takashima, Minoru Ota, Manabu Wakuda, Tatsuomi Nakayama, Hidenori Watanabe
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Publication number: 20050245178Abstract: An apparatus for machining a circumferential surface defining a cylindrical bore of a workpiece, the apparatus including a tool holder rotatable about a first rotation axis, and a form roller supported on the tool holder so as to be rotatable about a second rotation axis parallel to a central axis of the cylindrical bore of the workpiece. The form roller has a diameter smaller than a diameter of the cylindrical bore of the workpiece and is adapted for forming a plurality of microscopic recesses on the circumferential surface defining the cylindrical bore of the workpiece.Type: ApplicationFiled: April 28, 2005Publication date: November 3, 2005Inventors: Kazuhiko Takashima, Tatsuomi Nakayama, Minoru Ota, Manabu Wakuda
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Publication number: 20050197051Abstract: A high smoothness grinding process for obtaining a highly smooth surface of a metal material member. The process includes grinding an outer peripheral surface of a cylindrical or generally cylindrical metal material member by using a super abrasive grain grinding wheel in a condition in which a value [a peripheral speed of the grinding wheel/a peripheral speed of the metal material member] is not larger than 100, the grinding serving as a main grinding step.Type: ApplicationFiled: March 1, 2005Publication date: September 8, 2005Inventors: Kazuhiko Takashima, Minoru Ota, Manabu Wakuda, Tatsuomi Nakayama, Hidenori Watanabe
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Publication number: 20050103075Abstract: A micro-roll forming device for providing a cylindrical blank metal article with a minute convexoconcave bearing surface, comprises a powered article holding structure that, when energized, rotates the cylindrical blank metal article about its axis; a forming tool that includes a form roller with a corrugated circular ridge; a tool holding structure that holds the forming tool in such a manner that the corrugated circular ridge of the form roller is directed toward and in contact with an outer surface of the cylindrical blank metal article rotatably held by the article holding structure; a biasing member that is incorporated with the tool holding structure to press the form roller against the outer surface of the cylindrical blank metal article with a given pressing force; and a powered moving structure that, when energized, moves at least one of the article holding structure and the tool holding structure in such a manner that the selected one moves in both a first direction perpendicular to an axis of the uType: ApplicationFiled: November 8, 2004Publication date: May 19, 2005Inventors: Tatsuomi Nakayama, Minoru Ota, Manabu Wakuda, Kazuhiko Takashima
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Patent number: 6881126Abstract: A method of forming a traction drive rolling element including: forming a preform having a working surface with an arcuate profile in section taken along a central axis; supporting the preform to be rotatable about the central axis; allowing a relative movement between the preform and a grooving tool for moving the grooving tool along the arcuate profile, simultaneously with rotating the preform about the central axis, to form microscopic recesses and projections alternately arranged in a direction perpendicular to the central axis along the arcuate profile; pressing a grindstone having a contact surface area of 25 mm2 or less, on the working surface; and allowing a relative movement between the preform and the grindstone for moving the grindstone along the arcuate profile simultaneously with rotating the preform while keeping pressing the grindstone on the working surface until a height of the microscopic projections becomes 3 ?m or less.Type: GrantFiled: October 17, 2003Date of Patent: April 19, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Tatsuomi Nakayama, Minoru Ota, Minoru Numakura, Mamoru Saito, Hidenori Watanabe
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Patent number: 6869489Abstract: A steel for a high bearing pressure-resistant member, having a high machinability. The steel is formed of a machine structural steel comprising carbon in an amount ranging from 0.15 to 0.25% by weight, silicon in an amount of not less than 0.4% by weight, nickel in an amount ranging from 1 to 3% by weight, chromium in an amount ranging from 1.2 to 3.2% by weight, and molybdenum in an amount ranging from 0.25 to 2.0% by weight. The machine structural steel contains carbide precipitated under a heat treatment for spheroidizing. The carbide has an average particle size of not larger than 1 ?m and the maximum particle size of not larger than 3 ?m.Type: GrantFiled: May 15, 2001Date of Patent: March 22, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Toshimitu Kimura, Tatsuomi Nakayama, Hiroo Ueda, Noriko Uchiyama
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Publication number: 20040082272Abstract: A method of forming a traction drive rolling element including: forming a preform having a working surface with an arcuate profile in section taken along a central axis; supporting the preform to be rotatable about the central axis; allowing a relative movement between the preform and a grooving tool for moving the grooving tool along the arcuate profile, simultaneously with rotating the preform about the central axis, to form microscopic recesses and projections alternately arranged in a direction perpendicular to the central axis along the arcuate profile; pressing a grindstone having a contact surface area of 25 mm2 or less, on the working surface; and allowing a relative movement between the preform and the grindstone for moving the grindstone along the arcuate profile simultaneously with rotating the preform while keeping pressing the grindstone on the working surface until a height of the microscopic projections becomes 3 &mgr;m or less.Type: ApplicationFiled: October 17, 2003Publication date: April 29, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Tatsuomi Nakayama, Minoru Ota, Minoru Numakura, Mamoru Saito, Hidenori Watanabe
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Publication number: 20040077456Abstract: For producing a toroidal disc for a traction drive device, the following steps are employed. First, a circular steel body is prepared which has been subjected to a carbonitriding hardening/tempering process. The steel body has a concentric toroidal surface which is formed with a plurality of fine recesses each having a depth of smaller than 3 &mgr;m. Then, the circular steel body is turned about a rotation axis thereof. Then, a ball member is pressed against the toroidal surface with a given pressing force. And then, the ball member is moved on a given angular range of the toroidal surface in a direction perpendicular to the rotation axis of the circular steel body while being pressed against the toroidal surface with the given pressing force.Type: ApplicationFiled: September 15, 2003Publication date: April 22, 2004Applicant: NISSAN MOTOR CO., LTD.Inventors: Tatsuomi Nakayama, Minoru Ota, Hidenori Watanabe, Mamoru Saito
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Publication number: 20020000267Abstract: A steel for a high bearing pressure-resistant member, having a high machinability. The steel is formed of a machine structural steel comprising carbon in an amount ranging from 0.15 to 0.25% by weight, silicon in an amount of not less than 0.4% by weight, nickel in an amount ranging from 1 to 3% by weight, chromium in an amount ranging from 1.2 to 3.2% by weight, and molybdenum in an amount ranging from 0.25 to 2.0% by weight. The machine structural steel contains carbide precipitated under a heat treatment for spheroidizing. The carbide has an average particle size of not larger than 1 &mgr;m and the maximum particle size of not larger than 3 &mgr;m.Type: ApplicationFiled: May 15, 2001Publication date: January 3, 2002Applicant: NISSAN MOTOR CO., LTD.Inventors: Toshimitu Kimura, Tatsuomi Nakayama, Hiroo Ueda, Noriko Uchiyama